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http://www.businessinsider.com.au/duet-display-app-turns-ipad-into-second-screen-2014-12 http://www.businessinsider.com.au/duet-display-app-turns-ipa... Has a

• fuzzywalrus 12y ago
  "Most importantly, Duet Display is the first app that actually turns your iPad into a second display I’d actually like to use. As someone who has tried Air Display and uninstalled it shortly afterward, frustrated, I can honestly say this is the only option that’s worth it." Interesting, I tried Air Display and (another app) ages ago and used it off and on. It was "neat" and worked well as my Terminal window but a very poor stand for a monitor. Looks like I'll be dusting off my iPad 2.